Hello Brajesh

I have deactivated all my plugins except only buddypress,
I have changed my theme to default twenty twenty theme, I have deleted bp-custom.php file but still activity is not deleting on both frontend and backend

Thanks Brajesh

This is now resolved

Thanks for the feedback sir, correction noted

This are the 2 codes below being used as two different plugins

LOCATION TAXONOMY PLUGIN

 <?php
/**
Plugin Name: WP Taxonomy - Location
Version: 1.0
Author: WordPress
Description: Craete a new location taxonomy to organise content
*/

function create_post_location_taxonomy() {
  // Add new "Locations" taxonomy to Posts
  register_taxonomy('location', 'post', array(
    // Hierarchical taxonomy (like categories)
    'hierarchical' => true,
    // This array of options controls the labels displayed in the WordPress Admin UI
    'labels' => array(
      'name' => _x( 'Locations', 'taxonomy general name' ),
      'singular_name' => _x( 'Location', 'taxonomy singular name' ),
      'search_items' =>  __( 'Search Locations' ),
      'all_items' => __( 'All Locations' ),
      'parent_item' => __( 'Parent Location' ),
      'parent_item_colon' => __( 'Parent Location:' ),
      'edit_item' => __( 'Edit Location' ),
      'update_item' => __( 'Update Location' ),
      'add_new_item' => __( 'Add New Location' ),
      'new_item_name' => __( 'New Location Name' ),
      'menu_name' => __( 'Locations' ),
    ),
    // Control the slugs used for this taxonomy
    'rewrite' => array(
      'slug' => 'post-location', // This controls the base slug that will display before each term
      'with_front' => false, // Don't display the category base before "/locations/"
      'hierarchical' => true // This will allow URL's like "/locations/boston/cambridge/"
    ),
  ));
}
add_action( 'init', 'create_post_location_taxonomy', 0 ); 

POST TYPE TAXONOMY PLUGIN

 <?php
/**
Plugin Name: WP Taxonomy - Post Type
Version: 1.0
Author: WordPress
Description: Craete a new post type taxonomy to organise content
*/

function create_post_type_taxonomy() {
  // Add new "Post Types" taxonomy to Posts
  register_taxonomy('Post Type', 'post', array(
    // Hierarchical taxonomy (like categories)
    'hierarchical' => true,
    // This array of options controls the labels displayed in the WordPress Admin UI
    'labels' => array(
      'name' => _x( 'Post Types', 'taxonomy general name' ),
      'singular_name' => _x( 'Post Type', 'taxonomy singular name' ),
      'search_items' =>  __( 'Search Post Types' ),
      'all_items' => __( 'All Post Types' ),
      'parent_item' => __( 'Parent Post Type' ),
      'parent_item_colon' => __( 'Parent Post Type:' ),
      'edit_item' => __( 'Edit Post Type' ),
      'update_item' => __( 'Update Post Type' ),
      'add_new_item' => __( 'Add New Post Type' ),
      'new_item_name' => __( 'New Post Type Name' ),
      'menu_name' => __( 'Post Types' ),
    ),
    // Control the slugs used for this taxonomy
    'rewrite' => array(
      'slug' => 'post-type', // This controls the base slug that will display before each term
      'with_front' => false, // Don't display the category base before "/Post Types/"
      'hierarchical' => true // This will allow URL's like "/Post Types/public/"
    ),
  ));
}
add_action( 'init', 'create_post_type_taxonomy', 0 );